Forming machine



June l 1926-. 1,586,627

l... A. KOMINSKY FORMING MACHINE Filed Nov. 26. 1923 4 Sheets-Sheet .l

June l i926.

L. A. KOMINSKY FORMING MACHINE Filed Nov. 26, 1923 4 Sheets-Sheet 2 0 O411 l w m Y uw@ y June l 1926. 1,586,627

L. A. KOMINSKY FORMING MACHINE 'l Filed Nov. 2e. 1923 4 sheets-snaai sJune l1 1926. 1,586,627 l L. A. AKoMlNsKY FORMING MACHINE Filed Nov. 26.1923 4 sheets-sheet 4 www @W digr.

Patented Juney l', 1926.

y n 1,586,627 miENT oFFIoE.

@f2-ifi# QF CHICAGO, IPPINOIS- i lfalliiiiw MACHINE- tho" bgg@dig-ringdiefliending1015er@ ioni finyhe termed the primary forme`produc` 22 var-Imxg@d cross-WiSo oft-he machine: For

jdentificationithcse sliding forliiersli W] 5; .They we l-posi t1' onin' Fig-f l.v FIV-hoy" a'ife located on YmLzvioSiite.

gyp'c oai-iWork produced y y sov ing n'ieclmnisin are shown in detail in8. Each former is longitudinally slotted to receive a block 8G. theupper end whereofl is in the form of a threaded stud 38 projecting abovethe top of the former and adapted to The formers 18 are similarlyconstructed and operated, having studs 38 and clamping nuts 40 and beingreciprocated within their guides by means of .eccentrics rigidly securedto shaft 4. These eccentrics cooperate with a. short pitman 46 and along pitman 48 in the same manner as above described.

The eccentrics secured to shaft 14 are so timed as to operate theirrespective formers simultaneously and in opposite directions, and thesame istrue of the eccentrics which are secured to the shaft 4. Theeccentrics on shaft 14 are so timed with respect to those on shaft 4that they will move their formers forward after the primary formers 18have been moved forward. Thus the formers all move in timed relation,the primary formers 18 first moving forward to make the initial bend andthen the secondary formers 30 moving forward to make the nal bend.

The formers 18, 30 are all provided at their forward end with rollers 56shown in detail in Fig. 6. These rollers make direct contact with thework 24 and at the bottom have a flange 58 which forms a support for thework during the bending operation. These rollers are journaled uponshouldered pins 60 secured to the formers near their forward end. Asthese rollers are rotatable they practically eliminate friction whenacting upon the work. According` to the broader aspect the rollers andthe sliding elements upon which they are mounted may be taken togetheras constituting the formers of the machine.

Located within the center of the group of formers are two stationaryrollers 66 shown in detail in Fig. 6. They are also shown in F 4 and andit will be observed that they are so positioned as to Contact the workon opposite sides at a slight distance apart, depending upon the lengthof the central or body lportion of the S into which the work is to beformed. In practice the work is bent around them and hence they may beregarded as stationary forming dies or anvils. The diameter of theserollers determines the shape of the curve at the ends of the work. Thesestationary but rotatable dies may be mounted in any suitable manner.According to the present design they are mounted upon shouldered pins68, the

upper ends of which are threaded as shown of nuts Fig. i'.

after it is finished. Ejectors in themselves are known and in thepresent case the construction may be varied, but as illustrated the baris operated by a lever 7 8 shown in side elevation in Fig. 3. lt isfulcrumed upon a pin mounted in a standard 82. It is operated by apitman 84, the lower end of which is pivoted to a lever 86. This leveris pivoted at its inner end to a stationary bracket 88 and is actuatedat a point between its ends by a cam 90 rigidly mounted on shaft 4. Theresult is that every time the cam comes around it raises lever 86 andthis motion is transmitted to ejector bar '(6 which descends at theproper time and pushes the finished article downward to make room forfresh section of the bar.

In this machine the insertion of the work trips or starts the machine,which then automatically cuts off the proper length of bar, bends thework to shape and then ejects the work and stops the machine. I will nowdescribe the mechanism by which this is accomplished.

A. stationary guide 92 shown in plan in Fig. 1 is mounted in position onthe table to guide the bar to a position between the stationary dierollers 66. In line with this guide at a point past the dies is a block94 slidably mounted in a stationary clip 96. This block is fastened to apush rod 98 which is slidable in the upturned ends of a bracket 100. Thepush rod has on it a fixed collar 102 against which abuts a spring 104.The other end of the spring abut-s the far end of the bracket with theresult that the push rod is constantly urged forward, that is, towardthe operator and toward the incoming bar.

At the rear end the push rod is rigidly connected to a bell-crank lever100, which is pivoted upon a stationary fulcrum 108, shown at the rightend of Fig. 2. The opposite end of the bell-crank lever is connected toa rod 110, the lower end of which is connected to a trip lever 112,shown in detail in Figs. 9, 10 and 11. This trip lever is pivoted upona. stationary fulcrum 114 and has a pointed end 116 capable of enteringinto a slot on the under side of clutch pin 118. This clutch pin isslidingly mounted in a collar 120 keyed to shaft 4. It is aisance?yn'iitted to the shaft.

The flywheel, which is loose on the shaft, is confined between thekclutch collar 120 anda collar 121 which is keyed to the shaft on theopposite side of the hub of the flywheel.

`In `order that the shaft will rstop promptly when the clutch pin hasbeen withdrawn a friction brake 130`is provided which surrounds collar120 and is furnished with a brakeV lining 132. The friction brake isformed in two parts pivoted together on the pin 134 as shown near theupper right corneryof Fig. 1. `A hand screw 136 engages the freeends ofthe brake parts for regulating the friction of the brake on the collar.This hand screw is also shown at the right .endof Fig. 2. As indicatedthis brake prevents overthrow and in practice is so regulatedas to bringthe formers to rest in the normal position shown in Fig. 1 and in fulllines in Figs. 4 and 5. v

In the operation of the clutch mechanism, when the incoming 'bar engagesthe block 94 at the forward end of the push rod 98 and.

pushes it backward, the pointed end of the trip lever 112 will descendand release the clutch pin 118. The spring' 122 will then press the pintowards the flywheel and when the socket 1,24 comes opposite the pin,the pin `will enter into it and transmit the rotation of the flywheel tothe collar 120 and shaft 4. The machine then performs its function andejects the finished work, after which the push bar 98 `returns to normalposition, which causes the trip lever 112 to rise to the normal positionshown in Fig. 10. Consequently when the clutch pin comes around again itmoves into Contact with the pointed end of the trip lever, the obliquesurface whereof cams the pin back out of engagement with the flywheel,thus disconnecting the shaft from the Hywheel. The friction brake 180thereupon arrests the collar 120 and the main 4drive shaft 4. This,

restores all of the parts to normal position.

In this machine the bar is out off to proper length bymeans of a cutter140, which isi'astened to the former-body 18 as best shown at the leftof-Figs. 4 and 5. Asit `moves towards the right it cooperates with astationary cutter 142, `.which-is in line with guide 92 and also in linewith the cutter 140.

Operation: When the operator inserts a bar in the'machine he passes italong the guide 92 and betweenthe dies 66 until it contacts the trippingblock 94 and pushes it Jin dotted lines ink Fig.

`former doing .y its share i duce a pi andpush rod V98 bach until 112releasestheclutchpin 118 and thereby the trip leverk causes thelflywheel (which is the driving elev nient) to drive the main shaft u heprimary formers 18 then move forward to the" position shownin dottedylines in Fig.y 4. The flanges 58 of the rollers 56, which in a senseform part of the farmers, cometeneath the har and support it, the plateF2 at the samel time preventing the bar from ris-` ing. The rollersthereupon bend, the bar so that the ends assume the positions shown 4and 1n full lines in Fig. 5. AThe cutter 140, which advances at thistime, cuts oft' a portionof the bar preparatory to the bendingoperation.

. After the initial bending has been completed the supplemental formers30 move forward lengthwise of they machine from the position shown inyfull lines in Fig. 5 to the position shown in dotted lines. `Thisproduces the supplemental and .final bend'and brings the bar to theshape showny in dotted lines in Fig. 5.

When the work has thus been configurated the ejector 76 descends, theformers 18, 3() in the meantime moving back to original position andthus releasing the bar. The removal of thefinished work permits thetripping block 94 to return to initial position, which'throws ont theclutch in the manner previously explained and permits' t-he brakek 130to bring the machine to astandstill with the formers in initialposition.

The machine is then ready to have the operator insert a fresh length 'ofbar and the action of the machine to be repeated.

From the foregoing it will be evidentthat lmy machine is entirelyautomatic in its operation except feeding the bar into the machine. Thecutting, forming, starting, ejecting and stopping all follow as a resultof the insertion of the bar into the machine. It will also bev notedthat the forn'rers on the same side of the work more successively and atright angles to each other, each toward producing the final shape.Having thus descrilied my invention, what i clain'i new and desire ytosecure by Letters Patent 1. ii. bar bending machine having stationaryforming dies spaced apart in position to en; ige the work on oppositevsides and at dis .-.nt points, means .tor positioning the to morecrosswise of the bar to `engage por-l tions immediately beyond the Ldikto proary bend, and secondaryy formers les movable approximatelylengthwise of the bar and crosswiseto the first mentioned formers, thesecondary formers being adapted to the bent ends ofthe bar for producingan additional bend around the dies, and coordinating operating means forcausing` lirst the primary tormers to advance and then the secondarytormers to advance.

A bar bending; machine having stationary dies, each having` a curvedactinpsur- Ytacef a plnraiitv ot tolniers each having` a 'forming rollerfor engaging the bar, means tor guiding' said toi-mers in straight linesat an angle to each other and at an angle to the bar, and means 'toriuftuatine said 'tormers sucer vely to cause the rollers to producecuznu ative bending' etiieets upon the. bar.

3. )i bar bending machine having)- a stationary plate7 two rollersmounted thereon at a distance from each other so as to permit the workto pass between them and to Vensnie'e the work on opposite sides, meanstor limiting the distance to which the work can be inserted and movabletoriners located cn oppo, sides ot' the work and apted to move toward itto bend it around the rollers, the rollers having anges spaced from theplate 'tor holding' the work between the tiangges and the plate.

d. L `bar bending machine havingl two stationary dies eich having acurved acting surtace, a pair ol primary formels having? rollers orengaging the bar outside of the dies, a pair oit secondary toi-mers forengaging` the bar beyond the points engaged by the primary tormers.means tor guidingl the primary 'lormerain straiyht lines at an angle tothe bar, means n t'orincrs in stra'e'ht lines at an angle to the linesot movement ot the primary ormers, and means for advancingI iirst theprimary 'tcrmers and then the secondary ormers to produce cumulativebends upon the bar.

5. A bar bending' machine having a pair ot forming dies located inposition to engage the 1oar on opposite sides at non-adjacent points.qrollers adapted to engage the bar bevo-nd the die and slidable elementsfor advancing' said rollers approximately tangential to the dies torbending the bar around thenr G. i bar bending machine having` guidingmeans 'tor the bar, stationary dies upon which the bai` may be formed,former-s for n r am 'for yfuidinl the secondary bending the bar aroundthe dies, operating means `for the tormers7 means Jfor guiding theformer in straight lines approximately at right angles to the bar, apower device, a clutch for connecting the power device to the operatingmeans, and tripping mechanism operated by the worl; tor controlling 'theclutch.

l'. )i bar bending machine havinr a guide tor the bar` stationaryforming dies, movable 'lormers tor bending the bar around the dies,operating means for the iormers, a power device, a clutch for connectingthe power device to the operating means, wor-k controlled trippingmechanism :tor controlling; the clutch, and an ejector for the work,said ejector being operated by said operating means the ejector beingtimed to eject the work and thus cause the tripping` mechan :i to berestored preparatory to introducing a fresh piece ot work.

t?. n. bar bending machine having;1 two stationary dies spaced apart andeach havingl a curved artinr surface, means tor supportinjej the bar inposition to pass between the two itinmers, and project beyond them ateach end, a pair et primary tormers for enine` the bar on oppositesides, outside oi the dies a pair ot secondary foriners for menging thebar beyond the points engaged b v the j'n'imary 'tormers and on oppositesides ot the bar, means tor guiding the primary 'lormers in straightlines at an angle to the bar, means tor guiding` the secondary tormersin straight lines at an angle to the lines of movement ot' the primaryformers7 the lines of movement of the primary tormers beingapproximately parallel to each other, and the lines ot movement of thesecondary toriners being approximately parallel to each other7 and means'tor advancing` firstthe primary tormers simultaneously, and then thesecondary tormers simultaneously to produce cumulative bends ot oppositecurvature upon the bar.

In witness whereofA` l have hereunto subscribed my name.

LOUIS A. KOBHNSKY.

